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Finding the Fourth Proportional to 608.27, 912.21 and 218.25

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Solution

The fourth proportional to 608.27, 912.21 and 218.25 is: 327.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.27 : 912.21 = 218.25 : x
  2. Step 2: Convert to fraction form
    608.27/912.21 = 218.25/x
  3. Step 3: Cross multiply
    608.27x = 912.21 × 218.25
  4. Step 4: Simplify right side
    608.27x = 199,089.83
  5. Step 5: Solve for x
    x = 199,089.83/608.27
  6. Step 6: Final answer
    x = 327.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.